Intel CM8063601537106 Ficha Técnica Página 43

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Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family 43
Datasheet Volume Two: Functional Description, February 2014
iMC Functional Description
Execution of a single refresh is tRFC, and it takes 110 – 350 ns according to
DDR3 density.
iMC is equipped with CLTT temperature monitor and be able to issue auto refresh at the
2x rate (3.9 us).
5.3.3.1 Refresh Priorities
There are 3 levels of refresh priorities
1. Opportunistic
2. High-priority
3. Panic
The opportunistic refresh is executed when the scheduler thinks that it can issue it
without a significant penalty. High-priority is used when a backlog of refresh requests
has accumulated. At this point the refresh has higher priority than any other
transaction except for transactions. Panic is when refresh must be executed. Panic-
refresh is in higher priority than transactions.
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